Up to 20 travellers have pitched up in the car park at the bottom of Clyne Valley in Blackpill, Swansea.
They were reported to have arrived on Sunday and include around six caravans and up to a dozen other vehicles.
It's the first time since August last year that a group of travellers have turned up at a Swansea location other than the city's two recognised sites.
On that occasion, a group of traveller caravans moved onto a site next to Mumbles Hill House, overlooking Swansea Bay.
Swansea has two long-standing sites for travellers; an official site in Pant y Blawd in Llansamlet, and a 'tolerated' site in Swansea Vale.
Travellers' rights:
Travellers have in recent years also arrived and set-up camp on St Helen's recreation ground next to Mumbles Road.
A spokesman for Swansea Council said: "We are continuing to monitor the encampment in line with Welsh Government guidance on managing unauthorised sites."
